function loginClick(thisform) {
    var username = document.getElementById('username').value;
    var password = document.getElementById('password').value;
    if (username == 'admin' && password == '123456' || username == '123456789' && password == '123456' || username == '123456789@qq.com' && password == '123456') {
        window.document.login.action = 'shouye.html';
    } else {
        alert('账号或密码错误！');
    }
}